2H or N on a 4x4 93'
#4
Yeah, 2hi for on the street. Neutral is just like the transmission's neutral, it will disconnect BOTH driveshafts.
4HI is for dirt, gravel, deep snow, etc. It is a locked position meaning the front and rear axles are spun at exactly the same rate. When you turn, all 4 wheels take a different path through the turn, so they all travel a different rate. The differentials can take care of the right and left wheel on each axle traveling at different rates, but since the axles are locked together, one front wheel and one back wheel MUST be able to travel the same rate. Since all 4 wheels are rotating at a different rate, and one front wheel and one back wheel need to travel the same rate, driveline bindup occurs on hard, high traction surfaces. On loose, low traction surfaces, the wheels can slip to make up for the difference when you turn.
4Lo is the same thing, but is geared down more (2.72:1 on the np231 t case). 4lo does not give you more traction... you'll get the same traction in 4hi as you do 4lo, but have a lot more torque put to the axles and another gear reduction. It is used for climbing steep hills or crawling over rocks at a very slow pace and for pulling really heavy objects very short distances (like pulling your buddy out of a ditch :P).
4HI is for dirt, gravel, deep snow, etc. It is a locked position meaning the front and rear axles are spun at exactly the same rate. When you turn, all 4 wheels take a different path through the turn, so they all travel a different rate. The differentials can take care of the right and left wheel on each axle traveling at different rates, but since the axles are locked together, one front wheel and one back wheel MUST be able to travel the same rate. Since all 4 wheels are rotating at a different rate, and one front wheel and one back wheel need to travel the same rate, driveline bindup occurs on hard, high traction surfaces. On loose, low traction surfaces, the wheels can slip to make up for the difference when you turn.
4Lo is the same thing, but is geared down more (2.72:1 on the np231 t case). 4lo does not give you more traction... you'll get the same traction in 4hi as you do 4lo, but have a lot more torque put to the axles and another gear reduction. It is used for climbing steep hills or crawling over rocks at a very slow pace and for pulling really heavy objects very short distances (like pulling your buddy out of a ditch :P).
Last edited by 95_318SLT; 10-26-2009 at 11:04 PM.
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